Tunnel emergency alarm system

Abstract

In emergency transmission equipment that detects disconnections in signal wiring to manual notification devices, multiple connecting wires are derived from the middle of the signal wiring and connected to the transmitter (manual notification device), and the wiring from the connecting wires to the manual notification device is not monitored. [Solution] The emergency notification transmission equipment comprises a switch that is pressed in an emergency and a terminal block having multiple connection terminals. Two wires are led out from one switch terminal of the switch and connected to two connection terminals of the terminal block, and two other wires are led out from the other switch terminal and connected to the other two connection terminals of the terminal block.

Description

Technical Field

[0001] The present invention relates to an emergency notification transmitting facility and an emergency notification system for monitoring the wiring of a fire alarm transmitter.

Background Art

[0002] In tunnels such as highways and motorways, emergency facilities are installed according to the tunnel structure, traffic volume, etc. Emergency facilities include fire-fighting equipment and notification equipment. Notification equipment includes fire detectors, transmitters (push-button type notification devices), and disaster prevention receiving panels. Patent Document 1 describes a tunnel disaster prevention system in which a transmitter (manual notification device) is installed in a tunnel. In the tunnel disaster prevention system, the disaster prevention receiving panel has a function of monitoring the disconnection of the signal wiring to the manual notification device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Patent Document 1 describes a tunnel disaster prevention system. In Patent Document 1, a disconnection failure of the signal wiring (signal line) to the manual notification device is detected. However, a plurality of connection wirings are led out from the middle of the signal wiring and connected to the transmitter (manual notification device), and the wiring from the connection wiring to the manual notification device is not monitored. The transmitter is often provided in a box such as a fire hydrant box. A terminal block is provided in a fire hydrant box or the like, and wiring to internal devices is generally performed via the terminal block. Therefore, the wiring from the terminal block to the transmitter is connected by wiring of a certain length.

Means for Solving the Problems

[0005] The present invention is an emergency notification transmission device comprising a switch to be pressed in an emergency and a terminal block having a plurality of terminals, characterized in that two wires are led out from one switch terminal of the switch and connected to two terminals of the terminal block, and two other wires are led out from the other switch terminal and connected to the other two terminals of the terminal block. [Effects of the Invention]

[0006] This invention makes it possible to monitor not only signal wiring but also internal wiring within emergency notification equipment, from signal wiring to push switches. [Brief explanation of the drawing]

[0007] [Figure 1] Installation status of transmission equipment in tunnels. [Figure 2] Conventional transmission equipment and emergency notification system. [Figure 3] A transmission device and an emergency notification system according to an embodiment of the present invention. [Modes for carrying out the invention]

[0008] Figure 1 shows the installation of the emergency alarm transmitter (hereinafter referred to as "transmitter 1") in tunnel 8 in an embodiment of the emergency alarm system. A conventional emergency alarm transmitter (hereinafter referred to as "transmitter 9") is also installed in the same location as transmitter 1 and is therefore shown in Figure 1. In the system shown in Figure 1, the transmitter 1 and other components are also installed in a fire hydrant box 2 that houses a fire hose (not shown). The fire hydrant boxes 2 are installed at predetermined intervals inside tunnel 8. In the event of a fire, a fire hose can be retrieved from the fire hose storage compartment 21 of the fire hydrant box 2 and used to discharge water. Furthermore, a fire alarm is triggered when the push switch 11 of transmitter 1 is pressed. Transmitter 1 is connected to a disaster prevention receiving panel 3 via signal wiring 5 and 6, and the fire alarm triggers notification to the fire department and the discharge of water from sprinklers (not shown). Fires are also detected by signals from fire detectors 4, and the disaster prevention receiving panel 3 determines whether a fire has occurred.

[0009] Figure 2 shows the wiring of a conventional transmission equipment 9 and emergency alarm system. The emergency alarm system is equipped with multiple transmission equipment 9. The disaster prevention receiving panel 3 is connected to terminal blocks 92 provided on each of the multiple transmission equipment 9 via signal wires 5 and 6. Terminal blocks 92 are provided with multiple connection terminals that are insulated from each other. Two signal wires 5 and 6 are derived from the disaster prevention receiving panel 3, and each of the signal wires 5 and 6 connects to the terminal block 92 of each transmission equipment 9 with jumper wires. One signal wire 5 connected to the disaster prevention receiving panel 3 connects the first connection terminal 921 of each transmission equipment 9 in series. The other signal wire 6 connects the second connection terminal 922 of each transmission equipment 9 in series. In the last transmission equipment 9, the first connection terminal 921 and the second connection terminal 922 are connected by a terminating resistor 93. In each transmitting device 9, the first connection terminal 921 is connected to the first switch terminal 911 of the push switch 91 by internal wiring 94, and the second connection terminal 922 is connected to the second switch terminal 912 by internal wiring 95. The other terminals of the terminal block 92 are used for wiring other components, such as the power supply for emergency lights, but they do not have to be used for wiring.

[0010] When a fire occurs and a push switch 91 is pressed on any of the transmitting equipment 9, the first switch terminal 911 and the second switch terminal 912 are short-circuited, and the two signal wires 5 and 6 are short-circuited. This causes the potential difference between the two signal wires 5 and 6 to drop, and a fire is reported to the fire prevention receiving panel 3. When none of the push switches 91 are pressed, current flows through the termination resistor 93, creating a predetermined potential difference. If the signal wires 5 and 6 are broken anywhere, the current stops flowing, creating a high potential difference. Therefore, the fire prevention receiving panel 3 can detect a break in the signal wires 5 and 6.

[0011] In the conventional circuit configuration shown in Figure 2, it is possible to detect breaks in the signal wires 5 and 6 as described above. However, it is not possible to detect breaks in the internal wires 94 and 95 from the terminal block 92 to the push switch 91, or when the internal wires 94 and 95 are detached from the terminal block 92. The present invention makes it possible to detect breaks even in such cases.

[0012] Figure 3 shows the wiring of the transmission equipment 1 and the emergency alarm system in an embodiment of the present invention. The emergency alarm system is equipped with multiple transmission equipment 1. In each transmission equipment 1, the first switch terminal 111 is connected to the first connection terminal 121 and the second connection terminal 122 via internal wiring 14 and 15, and the second switch terminal 112 is connected to the third connection terminal 123 and the fourth connection terminal 124 via internal wiring 16 and 17. The signal wiring 5 derived from the disaster prevention receiving panel 3 is connected to the first connection terminal 121 of the terminal block 12, and the signal wiring 6 is connected to the third connection terminal 123. Between the transmission equipment 1s, the second connection terminal 122 is connected to the first connection terminal 121 via signal wiring 5, and the fourth connection terminal 124 is connected to the third connection terminal 123 via signal wiring 6. As described above, in the transmission equipment 1 of the present invention, the signal wirings 5 ​​and 6 and the internal wirings 14 to 17 are connected in series. In the final stage transmitting equipment 1, the second connection terminal 122 is connected to the fourth connection terminal 124 via the termination resistor 13. In the emergency notification system of this embodiment, signal wiring 5 and 6 from the disaster prevention receiving panel 3 are sequentially connected to the terminals of multiple terminal blocks 12, and the signal wiring 5 and 6 and internal wiring 14 to 17 are connected in series to monitor for disconnections.

[0013] Furthermore, similar to the transmission equipment 9, in the transmission equipment 1 of the present invention, when a push switch 11 is pressed in any of the transmission equipment 1, the potential difference between the two signal wires 5 and 6 disappears, and a fire is reported to the disaster prevention receiving panel 3. When none of the push switches 11 are pressed, current flows through the termination resistor 13, creating a predetermined potential difference. When the signal wires 5 and 6 are disconnected, the current stops flowing, creating a high potential difference. Therefore, the disaster prevention receiving panel 3 can detect disconnections in the signal wires 5 and 6. In the present invention, current also stops flowing through the signal wires 5 and 6 when there is a disconnection in the internal wiring 14 to 17, or when the internal wiring 14 to 17 is disconnected from the first switch terminal 111 or the second switch terminal 112. Therefore, the disaster prevention receiving panel 3 can also monitor for disconnections in the internal wiring 14 to 17, etc.

[0014] In addition to monitoring for wire breaks, the system can also identify early signs of failures (deterioration diagnosis) before wire breaks occur by analyzing trends in the current values ​​flowing through signal wires 5 and 6. For example, even if there are no wire breaks or disconnections from the terminals, if the current values ​​in signal wires 5 and 6 fall below the wire break prediction threshold, it can be determined that the resistance value in the area where a break or disconnection is about to occur is high, thus identifying an early sign of a wire break.

[0015] Furthermore, it is possible to diagnose signs of short circuits in wiring paths, etc. For example, if the internal wiring 15 is in contact with the third connection terminal 123 and the insulation deteriorates, a short circuit may cause a false alarm. If the current value of the wiring is greater than the short-circuit prediction threshold in the stage prior to a short circuit, but less than the value at which a fire is reported to the disaster prevention receiver panel 3, it can be identified as a sign of a short circuit. Note that the monitoring target for identifying faults such as wire breaks, signs of wire breaks, and signs of short circuits is not limited to the current value of the wiring; it may also include voltage values, resistance values, etc.

[0016] As can be seen from the conventional transmission equipment 9 in Figure 2 and the transmission equipment 1 of the present invention in Figure 3, the configurations of the terminal blocks 92 and 12 are the same for both transmission equipment 9 and transmission equipment 1. However, the wiring is different. Therefore, the conventional terminal blocks 12, etc., can be used, and the transmission equipment 1 and emergency notification system of the present invention can be constructed by changing the internal wiring to the switch terminals and connection terminals, and the connection of the signal wiring. Furthermore, as shown in Figure 2, if there are surplus connection terminals on the terminal blocks of an already installed emergency notification system, the transmission equipment 1 and emergency notification system of the present invention can be constructed simply by changing the wiring to the connection terminals.

[0017] Although embodiments of the present invention have been described in detail above with reference to the drawings, the specific configurations are not limited to these embodiments, and any design changes, etc., that do not depart from the gist of the present invention are also included. Furthermore, the above-described embodiments can be combined by utilizing each other's technologies, as long as there are no particular contradictions or problems in their purpose and configuration.

[0018] In the embodiment described above, an emergency alarm transmission device for a tunnel disaster prevention system was explained, but similarly, wiring breaks within the transmission device can also be monitored for emergency alarm transmission devices installed in other locations. Furthermore, in terms of monitoring faults such as wiring breaks, signs of wiring breaks, and signs of short circuits, the terminal block of the transmission device may be omitted, and the signal wiring and internal wiring may be integrated into a single wiring configuration, with the wiring from the disaster prevention receiving panel sequentially connected to the terminals of multiple push switches in series. [Explanation of Symbols]

[0019] 1 Transmitter, 11 Push switch, 111 First switch terminal, 112 Second switch terminal, 12 Terminal block, 121 First connection terminal, 122 Second connection terminal, 123 Third connection terminal, 124 Fourth connection terminal, 13 Termination resistor, 14 Internal wiring, 15 Internal wiring, 16 Internal wiring, 17 Internal wiring, 2 Fire hydrant box, 21 Fire hose storage, 3 Disaster prevention receiving panel, 4 Fire detector, 5 Signal wiring, 6 Signal wiring, 8 Tunnel, 9 Transmitter, 91 Push switch, 911 First switch terminal, 912 Second switch terminal, 92 Terminal block, 921 First connection terminal, 922 Second connection terminal, 93 Termination resistor, 94 Internal wiring, 95 Internal wiring

Claims

1. A pressure switch that is pressed in an emergency, A terminal block having multiple connection terminals, An emergency notification transmission device characterized by having two internal wires led out from one switch terminal of the aforementioned push switch and connected to two connection terminals of the terminal block, and two other internal wires led out from the other switch terminal and connected to two other connection terminals of the terminal block.

2. An emergency notification system comprising a plurality of emergency notification transmission devices according to claim 1, wherein signal wiring from a disaster prevention receiving panel is sequentially connected to the connection terminals of a plurality of terminal blocks, the signal wiring and the internal wiring are connected in series, and the signal wiring and the internal wiring are monitored.

3. It is equipped with multiple emergency notification transmitters that have push switches to be pressed in an emergency, An emergency notification system characterized by sequentially connecting wiring from a disaster prevention receiving panel to the switch terminals of multiple push switches in series, and monitoring the wiring.

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